Wrench.



G. S. TAPPAN.

WRENCH.

APPLICATION HLED AUG.13, m4.

U 1M Patented Apr. 13, 1915,

wi tmmooo I WW- I v K amzM GEORGE S. TAPPAN, 0F DIAMOND SPRING, CALIFORNIA.

WRENCH.

Specification of Letters Patent.

Patented Apr. 13, 19115.

Application filed August 13, 1914. Serial No. 856,656.

To all whom it may concern:

Be it known that I, GEORGE S. TAPPAN, a citizen of the United States, residing at Diamond Spring, in the county of Eldorado and State of California, have invented oer-- tain new and useful Improvements in Wrenches, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to new and useful improvements in wrenches and more particularly to an adjustable wrench whereby the same may be quickly and readily adjusted to fit various size nuts or other objects to which the device is to be applied, the main object of the present invention being the provision of a quick adjustable wrench which includes a relatively stationary jaw and a movable jaw, the movable jaw being adjusted toward or away from the stationary jaw and means carried by the handle for engagement with the shank of the movable jaw to retain said movable aw in its various adjusted positions.

Another object of the present invention is the provision of a device of this character which will possess advantages in points of efficiency and durability, is inexpensive to manufacture and, at the same time, is simple in construction and operation.

Vith the above and other objects in view, the invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claims.

In the accompanying drawing forming a part of this application, Figure 1 is a side elevation of a wrench constructed in accordance with my invention, parts thereof being broken away and illustrated in cross section. Fig. 2 is a rear edge elevation, parts thereof being broken away and illustrated in section; and Fig. 3 is a transverse sectional view taken on the line 3-3, Fig. 1.

Referring more particularly to the drawing, 1 indicates a stationary jaw which is of the usual well known type and is provided upon its inner face with the spaced bars 2, which are preferably formed integral with the jaw at the inner end thereof and extend inwardly therefrom in spaced parallel relation. These bars 2 project into the handle member 3 and are secured therein by having a spacing block 4: secured between the inner ends thereof and'having a set screw 5 extending inwardly through the inner end of the handle and engaging the block 4%.

Themovable jaw which is generally indicated by the numeral 6 is provided with an inwardly projecting shank member 7 adapted tobe movably disposed between the bars 2. The lnner side faces of the shank are provided with suitable recesses 8 which are adapted to receive therein the bars 2, so that the movable jaw may be readily adjusted toward or away from the stationary jaw. The outer edge of the movable shank 7 is provlded with a plurality of teeth 9 which are adapted to be arranged in alinement with the teeth 10 formed upon the outer edges of the bars 2. The handle 3 is provlded at its upper end with a metallic band 11 which is preferably of a size and form to embrace the bars 2 and securely retain them against any lateral movement.

In order to retain the movable shank 7 in an ad usted position with respect to the stationary bars 2, I provide a movable pawl which is in the form of a block 12 having upon its inner face a plurality of teeth 13 which are adapted to mesh with the teeth 9 and 10 upon the movable and stationary members whereby to retain the movable shank in its various adjusted positions. In order to actuate the block 12, plates 14 are secured to opposite sides of the block and extend through the handle upon the outer sides of the bars 2 and are provided at their opposite ends with a thumb piece 15 whereby the teeth of the block 12 may be quickly and readily engaged or disengaged from the teeth 9.

In order to normally retain the block 12 in engagement with the teeth 9 and 10, a bolt 16 is extended transversely through the plates It and bearing against the central portion of this bolt is a leaf spring 17, the inner end of which is secured to one end of the block 41-, by means of the set screw 18. From this it will be apparent that the block 12 is normally retained in engagement with the teeth 9 and 10 whereby to securely retain the jaw 6 in its respective adjusted positions. From this it will be apparent that by pressing inwardly upon the thumb piece 15, the teeth 13 on the block 12 may be quickly and readily disengaged from the teeth 9 and 10 to permit longitudinal ad justment of the movable shank 7 and move V the jaw 6 toward or away from the stationaryjaw l. r I a It will be apparent from the above description, taken in connection with the accompanying drawing, that I have provided ,a simple and durable adjustable monkey wrench, whereby nuts,'bolts and other 0bjectsfof this character and of various sizes may be readily manipulated. The device in itself is so constructed that the movable jaw may be readily adjusted toward or away from the stationaryjaw and, at the same time rigidly held against movement after being adjusted. The wrench in itself can be manufactured and placed upon the a market at a comparatively low cost.

While I have shown and described the preferred form of my invention, it will be obvious that various changes in the details of construction and in the proportions may be resorted to for successfully carrying my invention into practice, without sacrificing any of the novel features, or departing from the scope of the invention, as defined the rigid members, a handle adapted to inclose the inner ends of said stationary and movable shanks, a movable block having teeth adapted to normally engage the serrations, a finger piece connected with the block whereby to disengage the teeth from the serrations,.and spring means for normally retaining the teeth of said block in engagement with the serrations.

2. A device of the class described including a rigid jaw, spaced bars formed integral therewith, a movable jaw having recesses in the side faces thereof, whereby to receive said bars, a shank formed integral with the movable jaw and disposed between said bars, serrations formed upon one of the longitudinal edges of said bars and shank, a handle, a movable block supported by the handle and having teeth for engagement with the serrations, plates secured to opposite sides of the block and extending through the handle, a thumb piece connected to the other ends of said plates, a bolt extending through the plates adjacent one end, and a leaf spring engaging said bolt whereby to yieldably retain the block in engagement with the serrations as and for the purpose set forth.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses.

GEORGE S. TAPPAN.

Witnesses CHARLES E. HAND, MAX MIERSON.

C opies'of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G." 

